Raw underway Thermosalinograph (TSG) observations from the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 272, May 2021

Here we present the 6-second resolution raw Thermosalinograph (TSG) data collected between 14 May and 21 May 2021 during the Integrated Ecosystem Programme: Southern Benguela (IEP:SB) cruise on the Algoa Voyage 272. A SeaBird SBE45 Thermosalinograph (TSG) is used to opportunistically collect underway near-surface temperature and conductivity measurements during research and monitoring cruises. Water is continuously pumped to the TSG from an intake located in the hull of the vessel, and the observations are continuously interfaced with navigational information. A temperature sensor close to the intake provides temperature measurements of the incoming water (T1). The temperature of the water inside the conductivity cell (T2) is used to accurately compute salinity (S) from the conductivity measurements (C). The IEP:SB in 2013 consolidated a long-term, multi-decadal time-series (from 1951 onward) of information for this important region and has continued monitoring in the form of the IEP:SB. The programme is a multi-disciplinary, collaborative and capacity building platform undertaking relevant science, including updating technology, with the aim to develop ecosystem indicators that can be used to effectively monitor and understand the Southern Benguela. These include physical, chemical, planktonic, microbial, seabird, marine mammal, benthic and pollution (plastic) ecosystem indicators as required by ecosystem-based management regarding the following priorities: ocean warming, ocean acidification, trophic functioning, pollution and water quality. It is on-going monitoring programme.

本节中，我们呈现了在2021年5月14日至21日期间，于‘Algoa’号272次航行期间，在综合生态系统计划：南方本格拉（IEP:SB）巡航中收集的6秒分辨率原始热盐仪（TSG）数据。采用SeaBird SBE45热盐仪（TSG）在研究巡航和监测巡航期间，偶然收集了近表面温度和电导率的测量数据。水体从船体上的一个取水口连续泵送至TSG，观测数据与导航信息持续进行接口对接。靠近取水口的一个温度传感器提供了进入水体的温度测量值（T1）。通过电导率测量值（C）准确计算水体在电导池内的温度（T2），从而得出盐度（S）。2013年，IEP:SB对自1951年以来的长期、跨数十年时间序列信息进行了整合，并继续通过IEP:SB进行监测。该计划是一个多学科、协作和人才培养平台，承担相关科学任务，包括更新技术，旨在开发可用于有效监测和理解南方本格拉生态系统的生态系统指标。这些指标包括物理、化学、浮游生物、微生物、海鸟、海洋哺乳动物、底栖和污染（塑料）生态系统指标，以满足基于生态系统的管理对以下优先事项的需求：海洋变暖、海洋酸化、营养功能、污染和水质。这是一个持续进行的监测项目。